Honda Motor Co., Ltd.

Mitsuo Kadota

Kensaku Yamamoto

Tsuneo Endo

Seiichiro Ishikawa

Hiroshi Hanabusa

Yuki Shibahata

Daiki Sato

Hidemi Arai

A liquid flow rate control valve is provided in which since a total area of overlapping sections of a communication hole group () of a distributor () and an outlet opening () of a sleeve () changes when the distributor () is rotated by a first electric motor (), if a rotor () is rotated by means of a second electric motor (), an input port () communicates with an output port () through an inlet opening () of the rotor (), the communication hole group () of the distributor (), and the outlet opening () of the sleeve () when the inlet opening () of the rotor () passes through the overlapping sections, thereby making it possible to carry out PWM control of a flow rate of liquid. Since a thrust load in an axis (L) direction does not act on the distributor () and the rotor (), supporting the distributor () and the rotor () becomes easy, thereby enabling the cost and weight to be cut.

Liquid flow rate control valve

In an internal combustion engine variable compression ratio system, a compression ratio of an internal combustion engine is changed over between a high compression ratio and a low compression ratio with a changeover threshold value corresponding to a predetermined operational condition of the internal combustion engine being a boundary. When the internal combustion engine enters a slow acceleration state or a slow deceleration state, a changeover is performed first and then the state is maintained for a predetermined period by prohibiting re-changeover. Therefore, changeover hunting can be prevented in the system while maintaining an appropriate compression ratio in conformity with traveling characteristics demanded by a driver, when the internal combustion engine in a state of slow acceleration or slow deceleration.

Internal combustion engine variable compression ratio system

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Wako, Japan

Mitsuo Kadota